i wouldnt; think it would just go out but there is a check plug indicator you can can get at auto zone i think that plugs into your trucks harness and will have several lights on it. if they all don;t like up you know your problem is your truck and not your trailer

One of the lights on my boat trailer is out, I swapped out the bulb but to no avail. What else can it be? Fuse is ok. Ground is fine. Could it be the connectors at the truck's plug?

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I've had the same problem with my boat trailer. I had the bulb go out replaced the bulb and it didn't work. The other lights on the trailer worked so i didn't think it was any wire or anything with my truck. The socket had alot of corrosion on it. I took some sand paper and sanded the corrosion off of it. I had the grease that is for electrical connection and put that in the socket. Light now works. Good Luck